Pretreatment and enzymatic saccharification of oak at high solids loadings to obtain high titers and high yields of sugars

Dong Hyun Kim, Hyun Min Park, Young Hoon Jung, Prakit Sukyai, Kyoung Heon Kim

Research output: Contribution to journalArticle

6 Citations (Scopus)

Abstract

Production of high-titer sugar from lignocellulose is important in terms of process economics of bio-based product industry. In this study, to obtain high titers and yields of sugars, we combined pretreatment and saccharification steps, both at high solids loadings. First, pretreatment of oak was optimized at a 30% (w/w) solids loading. The whole slurry of the pretreated oak was subjected to a fed-batch saccharification step at the final solids loading of 30%, to minimize loss of fermentable sugars and simplify the processes. As a result, high-titer sugars (157.5 g/L) consisting of 120.2 g/L of glucose and 37.3 g/L of xylose were obtained at 75.9% and 58.6%, respectively, of theoretical maximum yields, based on the initial glucan and xylan contents. Thus, through proper optimization processes of oak, the combination of pretreatment and saccharification at high solids loadings was effective in obtaining both high titers and high yields of sugars from lignocellulose.

Original languageEnglish
Pages (from-to)391-397
Number of pages7
JournalBioresource Technology
DOIs
Publication statusPublished - 2019 Jul 1

Keywords

  • Fermentable sugars
  • High solids loading
  • Lignocellulose
  • Oak
  • Pretreatment
  • Saccharification

ASJC Scopus subject areas

  • Bioengineering
  • Environmental Engineering
  • Renewable Energy, Sustainability and the Environment
  • Waste Management and Disposal

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